/*
 * Copyright (C) by Argonne National Laboratory
 *     See COPYRIGHT in top-level directory
 */

#include "adio.h"
#include "adio_extern.h"
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif

void ADIO_Close(ADIO_File fd, int *error_code)
{
    int i, myrank, err;
    static char myname[] = "ADIO_CLOSE";

    if (fd->async_count) {
        *error_code = MPIO_Err_create_code(MPI_SUCCESS, MPIR_ERR_RECOVERABLE,
                                           myname, __LINE__, MPI_ERR_IO, "**io",
                                           "**io %s", strerror(errno));
        return;
    }

    /* because of deferred open, this warants a bit of explaining.  First, if
     * we've done aggregation,
     * then close the file.  Then, if any process left has done independent
     * i/o, close the file.  Otherwise, we'll skip the fs-specific close and
     * just say everything is a-ok.
     *
     * XXX: is it ok for those processes with a "real" communicator and those
     * with "MPI_COMM_SELF" to both call ADIOI_xxx_Close at the same time ?
     * everyone who ever opened the file will close it. Is order important? Is
     * timing important?
     */
    if (fd->hints->deferred_open && fd->is_agg) {
        (*(fd->fns->ADIOI_xxx_Close)) (fd, error_code);
    } else {
        if (fd->is_open) {
            (*(fd->fns->ADIOI_xxx_Close)) (fd, error_code);
        } else {
            *error_code = MPI_SUCCESS;
        }

    }

    if (fd->access_mode & ADIO_DELETE_ON_CLOSE) {
        /* if we are doing aggregation and deferred open, then it's possible
         * that rank 0 does not have access to the file. make sure only an
         * aggregator deletes the file.*/
        MPI_Comm_rank(fd->comm, &myrank);
        if (myrank == fd->hints->ranklist[0]) {
            ADIO_Delete(fd->filename, &err);
        }
        MPI_Barrier(fd->comm);
    }

    if (fd->fortran_handle != -1) {
        ADIOI_Ftable[fd->fortran_handle] = MPI_FILE_NULL;
    }

    if (fd->hints)
        ADIOI_Free(fd->hints->ranklist);
    if (fd->hints && fd->hints->cb_config_list)
        ADIOI_Free(fd->hints->cb_config_list);

    /* This BlueGene platform-specific free must be done in the common code
     * because the malloc's for these hint data structures are done at the
     * scope of ADIO_Open within the SetInfo call (ADIOI_GPFS_SetInfo which
     * calls ADIOI_BG_gen_agg_ranklist).  They cannot be done in the
     * ADIOI_GPFS_Close because of the file creation case where the
     * ADIOI_GPFS_Close and re-open via ADIOI_GPFS_Open are done which results
     * in a double-free - ADIOI_GPFS_Open does not redo the SetInfo...  */
#ifdef BGQPLATFORM
    if (fd->hints && fd->hints->fs_hints.bg.bridgelist)
        ADIOI_Free(fd->hints->fs_hints.bg.bridgelist);
    if (fd->hints && fd->hints->fs_hints.bg.bridgelistnum)
        ADIOI_Free(fd->hints->fs_hints.bg.bridgelistnum);
#endif

    /* Persistent File Realms */
    if (fd->hints->cb_pfr == ADIOI_HINT_ENABLE) {
        /* AAR, FSIZE, and User provided uniform File realms */
        if (1) {
            MPI_Type_free(&fd->file_realm_types[0]);
        } else {
            for (i = 0; i < fd->hints->cb_nodes; i++) {
                MPI_Type_free(&fd->file_realm_types[i]);
            }
        }
        ADIOI_Free(fd->file_realm_st_offs);
        ADIOI_Free(fd->file_realm_types);
    }
    ADIOI_Free(fd->hints);



    MPI_Comm_free(&(fd->comm));
    ADIOI_Free(fd->filename);

    ADIOI_Type_dispose(&(fd->etype));
    ADIOI_Type_dispose(&(fd->filetype));

    MPI_Info_free(&(fd->info));

    ADIOI_Free(fd->io_buf);
    ADIOI_OneSidedCleanup(fd);

    /* memory for fd is freed in MPI_File_close */
}
